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PCP building blog

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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PCP building blog

Unread postAuthor: wyz2285 » Wed Feb 01, 2012 11:55 am

Hi every one.
I have started my new pcp project. (BTW Gun Freak hope that´s ok to you :wink: )
I had did some big modifications to the blowgun valve, replacing the original rubber seal by a harder seal material that are used in co2 pin valves. Now it deals with high pressure with on problem. I have charged ti to 500 psi, left it for 5h, no leaks at all 8) then I checked the valve internals, no damage :D .
The quick connection is a industrial type, build for high pressure, I add a internal one way valve so I don´t need a ball valve, making it light and better looking.
It gives me at least 60 shots :o , after than the pressure drop to about 300, still very ok for airsoft bbs.
It actually hurts a lot if you put your finger near the out put and hammer it, when fully charged :P
Video about what I got so far: [youtube]http://www.youtube.com/watch?v=cEJXBzGVEmc[/youtube]
Also, this topic is for all pcp style small bore air rifles, anybody can post their builds here, keeping the showcase organized :wink:
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Gun Freak » Wed Feb 01, 2012 4:54 pm

Very nice!! Is 500 all you plan on using? Or will you take this one up to 1,000? Video :)
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Unread postAuthor: wyz2285 » Wed Feb 01, 2012 5:27 pm

Not sure about 1000, but definitely 800 :wink:
Next video: with trigger plus hammer mechanism :twisted:
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Zeus » Wed Feb 01, 2012 6:26 pm

Careful with putting your finger near the output, it can cause an air embolism, just a tiny amount of air might not cause a problem with your heart, but if it gets into the capillaries in your lungs, collapsed lung, in your brain, a stroke.

I still want to see your builds, so please be careful.


Good work too, the finished build will be impressive.
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/sarcasm, /hyperbole
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Unread postAuthor: Gun Freak » Wed Feb 01, 2012 6:40 pm

And I think you should invest in a crescent wrench, lol :lol:
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Unread postAuthor: dahakka » Wed Feb 01, 2012 8:07 pm

gun freak and wyz2285
you guys are awesome
:cry: :cry:
wait to see your magazine ,i'm having a trouble with it
:lol:
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Unread postAuthor: SpudBlaster15 » Wed Feb 01, 2012 8:30 pm

I clicked on this thread.

I read it.

The whole thing.

Even looked at the pretty pictures.

I'm so proud of myself. :D
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Unread postAuthor: Gun Freak » Wed Feb 01, 2012 8:37 pm

:hello1:

I like you sig quote, SB.
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Unread postAuthor: wyz2285 » Thu Feb 02, 2012 12:12 pm

Good for you SB15 :wink: , don´t worry, I´m planing on a hybrid too, just need to read the "hybrid fueling 101" :lol:
Thanks Zeus, didn´t knew that :)
Gonna buy a drillpress this weekend so I can use it like a lathe and machine the hammer(yeap on this gun it´s still going to be a inline striker) and bolt :)
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: killerbanjo » Thu Feb 02, 2012 1:12 pm

Looks nice but I think you took "hammer valve" a little too literally :P

But it really does look good, cant wait to see it unfold :)
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Unread postAuthor: urgle the danish cow » Thu Feb 02, 2012 4:40 pm

what did you use as the new sealing face for your valve stem?
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Unread postAuthor: iron7anrho » Fri Feb 03, 2012 7:54 am

what kind of epoxy you use? is there any name for that type of epoxy? it's strong enough to hold tht much of pressure :) thnks :D
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Unread postAuthor: wyz2285 » Fri Feb 03, 2012 1:51 pm

The sealing came from a co2 pin valve pin, about epoxy I used one with 360 bar rated.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Gippeto » Fri Feb 03, 2012 2:36 pm

The epoxy is rated at 360bar?

Would that be an actual pressure rating...or perhaps...a mechanical property? ie...lap shear strength

Care to name the brand and type?

Well worth careful consideration considering the proximity this piece is going to have to your face. :wink: (yours...not mine...and so is the choice to use it or not)

IMO...it's best to think "if it can fail...then it WILL".
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Unread postAuthor: wyz2285 » Fri Feb 03, 2012 3:07 pm

or perhaps...a mechanical property?

Mechanical, 360 kg/cm2
There is no way to fail, I even have drilled a couple holes so the epoxy can grab.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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